Irish Water has confirmed that work is underway on replacing a section of water mains on the Sligo Road in Ballina.
Recurring water bursts on this section have been causing problems for local residents and businesses for some time.
The 750 metre section of water mains will be upgraded on the Sligo Road to improve water supply and reduce high levels of leakage.
A traffic management plan is in place while the works are ongoing.
Irish Water says the work should be completed by the end of April.